如图,在长方体
中,
是底面
内的动点,
,
,
,
分别为
,
,
,
的中点,若
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbad56884c1cb3160d481fc560da5228.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/e9192e67-f89e-45a8-9a73-1b1f3745bfef.png?resizew=160)
A.![]() |
B.三棱锥![]() |
C.若![]() ![]() ![]() |
D.![]() ![]() |
23-24高二上·湖南·阶段练习 查看更多[4]
湖湘名校教育联合体2023-2024学年高二上学期10月联考数学试题(已下线)2023-2024学年高二上学期数学期末预测基础卷(人教A版2019)广西壮族自治区三新学术联盟2023-2024学年高二上学期期末教学质量检测数学试题(已下线)1.3 空间向量及其运算的坐标表示【第三练】
更新时间:2023-10-14 18:50:28
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【推荐1】已知正三棱锥的侧棱长为
,底面边长为6,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
A.正三棱锥的高为6 |
B.正三棱锥的表面积为![]() |
C.正三棱锥的体积为![]() |
D.正三棱锥的外接球的体积为![]() |
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【推荐2】在四棱锥
中,已知底面
是边长为
的正方形,侧面
为正三角形.则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
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A.当四棱锥![]() ![]() |
B.侧棱![]() ![]() ![]() |
C.四棱锥![]() |
D.四棱锥![]() ![]() |
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【推荐1】如图,在正四棱锥P﹣ABCD中,AB=1,PB=2,E是PC的中点.设棱锥P﹣ABCD与棱锥E﹣BCD的体积分别为V1,V2,PB,PC与平面BDE所成的角分别为α,β,则( )
![](https://img.xkw.com/dksih/QBM/2021/8/5/2779785293250560/2788344519925760/STEM/3c7a5528-da4c-438f-a631-106a5c51717d.png?resizew=248)
![](https://img.xkw.com/dksih/QBM/2021/8/5/2779785293250560/2788344519925760/STEM/3c7a5528-da4c-438f-a631-106a5c51717d.png?resizew=248)
A.PA∥平面BDE | B.PC⊥平面BDE |
C.V1:V2=4:1 | D.sinα:sinβ=1:2 |
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【推荐2】已知圆锥的底面半径为1,高为
,
为顶点,
,
为底面圆周上两个动点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/7d9415dc-fbb8-4abb-99f8-2c86c868a964.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/7d9415dc-fbb8-4abb-99f8-2c86c868a964.png?resizew=136)
A.圆锥的体积为![]() ![]() |
B.圆锥的侧面展开图的圆心角大小为![]() |
C.圆锥截面![]() ![]() |
D.从点![]() ![]() ![]() |
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【推荐3】在矩形
中,
,沿对角线
将矩形折成一个大小为
的二面角
,若
,则下列各选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4661615c1b22a44ed1396d5f05831967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c909cd1b6f3fa1ec39eb245e8f5c11c.png)
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A.四面体![]() ![]() |
B.点B与点D之间的距离为![]() |
C.四面体![]() ![]() |
D.异面直线![]() ![]() ![]() |
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【推荐1】如图,在平行六面体
中,AC与BD交于
点,且
,
,
.则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3e58edd1f900ca82bb2a3058293f52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/9fd77819-9f67-4b33-a39f-835c54aea3a8.png?resizew=167)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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【推荐2】如图,在直棱柱
中,
分别是
的中点,则下列说法正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/9a8c2f7a-0060-4d9b-9e4c-a9722cdd0b3a.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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A.![]() |
B.![]() |
C.直线![]() ![]() ![]() |
D.![]() |
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【推荐1】已知空间向量
则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3710e31c66b55378ef5fb70c77da5f24.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() | D.![]() |
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【推荐2】棱长为1的正四面体
内有一点
,满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d337068ba9ebbd3a31b54a648d109e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次